diff --git a/srcs/requirements/nestjs/api_back/src/chat/chat.controller.ts b/srcs/requirements/nestjs/api_back/src/chat/chat.controller.ts
index 81037ddc..5911f152 100644
--- a/srcs/requirements/nestjs/api_back/src/chat/chat.controller.ts
+++ b/srcs/requirements/nestjs/api_back/src/chat/chat.controller.ts
@@ -120,7 +120,7 @@ export class ChatController {
 		{
 			let forbidden_chars = room.name.replace(new RegExp(regex_base, "g"), "");
 			printCaller(`throw error: error: true, code: 'FORBIDDEN_CHARACTERS', message: 'Your room name can not contains these characters : ${forbidden_chars}'`);
-			throw new HttpException({ error: true, code: 'FORBIDDEN_CHARACTERS', message: `Your room name can not contains these characters : ${forbidden_chars}` }, HttpStatus.OK);
+			throw new HttpException({ error: true, code: 'FORBIDDEN_CHARACTERS', message: `Your room name can not contains these characters : ${forbidden_chars}` }, HttpStatus.UNPROCESSABLE_ENTITY);
 		}
 
 		if (typeof room.protection === 'undefined')
@@ -130,7 +130,7 @@ export class ChatController {
 			if (!room.password || room.password.length === 0)
 			{
 				printCaller(`throw error: error: true, code: 'PASSWORD_TOO_SHORT', message: 'your password is too short'`);
-				throw new HttpException({ error: true, code: 'PASSWORD_TOO_SHORT', message: `your password is too short` }, HttpStatus.OK);
+				throw new HttpException({ error: true, code: 'PASSWORD_TOO_SHORT', message: `your password is too short` }, HttpStatus.UNPROCESSABLE_ENTITY);
 			}
 		}
 		room.users = [req.user.username];
@@ -164,17 +164,17 @@ export class ChatController {
 			if (room_db.type === 'direct')
 			{
 				console.log("throw error: error: true, code: 'JOIN_DIRECT_FORBIDDEN', message: 'cannot join a direct messages room'");
-				throw new HttpException({ error: true, code: 'JOIN_DIRECT_FORBIDDEN', message: `cannot join a direct messages room` }, HttpStatus.OK);
+				throw new HttpException({ error: true, code: 'JOIN_DIRECT_FORBIDDEN', message: `cannot join a direct messages room` }, HttpStatus.CONFLICT);
 			}
 			if (room_db.type === 'private')
 			{
 				console.log("throw error: error: true, code: 'JOIN_PRIVATE_FORBIDDEN', message: 'cannot join a private room'");
-				throw new HttpException({ error: true, code: 'JOIN_PRIVATE_FORBIDDEN', message: `cannot join a private room` }, HttpStatus.OK);
+				throw new HttpException({ error: true, code: 'JOIN_PRIVATE_FORBIDDEN', message: `cannot join a private room` }, HttpStatus.CONFLICT);
 			}
 			if (room_db.users.includes(req.user.username))
 			{
 				console.log("throw error: error: true, code: 'ALREADY_JOIN', message: 'your have already joined this room'");
-				throw new HttpException({ error: true, code: 'ALREADY_JOIN', message: `your have already joined this room` }, HttpStatus.OK);
+				throw new HttpException({ error: true, code: 'ALREADY_JOIN', message: `your have already joined this room` }, HttpStatus.CONFLICT);
 			}
 			room = await this.chatService.addUserToRoom(req.user.username, room.name);
 		}
@@ -201,7 +201,7 @@ export class ChatController {
 			if (!room_db.allowed_users.includes(req.user.username))
 			{
 				console.log("throw error: error: true, code: 'NEED_AUTHENTICATE', message: 'You didn't provide the password for this room'");
-				throw new HttpException({ error: true, code: 'NEED_AUTHENTICATE', message: `You didn't provide the password for this room` }, HttpStatus.OK);
+				throw new HttpException({ error: true, code: 'NEED_AUTHENTICATE', message: `You didn't provide the password for this room` }, HttpStatus.UNAUTHORIZED);
 			}
 		}
 
@@ -228,7 +228,7 @@ export class ChatController {
 			if (!room.password)
 			{
 				console.log("throw error: error: true, code: 'PASSWORD_MISSING', message: 'this room is protected, you need to provide a password'");
-				throw new HttpException({ error: true, code: 'PASSWORD_MISSING', message: `this room is protected, you need to provide a password` }, HttpStatus.OK);
+				throw new HttpException({ error: true, code: 'PASSWORD_MISSING', message: `this room is protected, you need to provide a password` }, HttpStatus.UNAUTHORIZED);
 			}
 			if (!room_db.allowed_users.includes(req.user.username))
 				await this.chatService.setPasswordValidation(req.user.username, room);
diff --git a/srcs/requirements/nestjs/api_back/src/chat/chat.service.ts b/srcs/requirements/nestjs/api_back/src/chat/chat.service.ts
index 066a7361..e0dde777 100644
--- a/srcs/requirements/nestjs/api_back/src/chat/chat.service.ts
+++ b/srcs/requirements/nestjs/api_back/src/chat/chat.service.ts
@@ -218,7 +218,7 @@ export class ChatService {
 		if (find_room)
 		{
 			console.log("throw error: error: true, code: 'ROOM_CONFLICT', message: 'This room name already exist'");
-			throw new HttpException({ error: true, code: 'ROOM_CONFLICT', message: `This room name already exist` }, HttpStatus.OK);
+			throw new HttpException({ error: true, code: 'ROOM_CONFLICT', message: `This room name already exist` }, HttpStatus.CONFLICT);
 		}
 
 		let hash;
@@ -228,7 +228,7 @@ export class ChatService {
 			if (room.type === 'direct')
 			{
 				console.log("throw error: error: true, code: 'DIRECT_PASSWORD_FORBIDDEN', message: 'you cannot set a password in a direct message room'");
-				throw new HttpException({ error: true, code: 'DIRECT_PASSWORD_FORBIDDEN', message: `you cannot set a password in a direct message room`}, HttpStatus.OK);
+				throw new HttpException({ error: true, code: 'DIRECT_PASSWORD_FORBIDDEN', message: `you cannot set a password in a direct message room`}, HttpStatus.FORBIDDEN);
 			}
 			const saltOrRounds = 10;
 			const password = room.password;
@@ -298,12 +298,12 @@ export class ChatService {
 		if (!room.users.includes(username))
 		{
 			console.log("throw error: error: true, code: 'USER_NOT_FOUND', message: 'your are not in this room'");
-			throw new HttpException({ error: true, code: 'USER_NOT_FOUND', message: `your are not in this room` }, HttpStatus.OK);
+			throw new HttpException({ error: true, code: 'USER_NOT_FOUND', message: `your are not in this room` }, HttpStatus.NOT_FOUND);
 		}
 		if (room.type === "direct")
 		{
 			console.log("throw error: error: true, code: 'LEAVE_DIRECY_FORBIDDEN', message: 'you cannot leave a direct messages conversation'");
-			throw new HttpException({ error: true, code: 'LEAVE_DIRECY_FORBIDDEN', message: `you cannot leave a direct messages conversation` }, HttpStatus.OK);
+			throw new HttpException({ error: true, code: 'LEAVE_DIRECY_FORBIDDEN', message: `you cannot leave a direct messages conversation` }, HttpStatus.FORBIDDEN);
 		}
 
 		// delete user from room
diff --git a/srcs/requirements/svelte/api_front/src/pieces/chat/Layout_create.svelte b/srcs/requirements/svelte/api_front/src/pieces/chat/Layout_create.svelte
index b23f1179..99030f01 100644
--- a/srcs/requirements/svelte/api_front/src/pieces/chat/Layout_create.svelte
+++ b/srcs/requirements/svelte/api_front/src/pieces/chat/Layout_create.svelte
@@ -44,7 +44,7 @@
 		response = await create_room(room);
 
 		// go to room
-		if (response.status >= 300)
+		if (response.status >= 300 || response.error)
 			show_error = response.error;
 		else
 			await change_room(response.room);
diff --git a/srcs/requirements/svelte/api_front/src/pieces/chat/Layout_protected.svelte b/srcs/requirements/svelte/api_front/src/pieces/chat/Layout_protected.svelte
index 9b614bf0..201582d2 100644
--- a/srcs/requirements/svelte/api_front/src/pieces/chat/Layout_protected.svelte
+++ b/srcs/requirements/svelte/api_front/src/pieces/chat/Layout_protected.svelte
@@ -32,7 +32,7 @@
 		response = await send_password(room);
 
 		// go to room
-		if (response.status >= 300)
+		if (response.status >= 300 || response.error)
 			show_error = response.error;
 		else
 			await change_room(response.room);